RADIUM Engineering 20-0270-01 Coolant Expansion Tank for Lotus Elise/Exige

The RADIUM Engineering 20-0270-01 is a precision-engineered coolant expansion tank designed specifically for the Lotus Elise and Exige. This direct OEM location replacement provides superior cooling system performance with advanced thermal management features.

Construction and Design:

• CNC machined from billet aluminum for exceptional strength and heat dissipation
• Laser-etched markings with durable anodized finish for long-lasting appearance
• Low-profile design maintains factory fitment and clearances
• Includes stainless steel mounting hardware for corrosion resistance

Advanced Features:

• Dual-chamber design with two crossover passages for improved fluid circulation
• Internal swirl feature promotes air separation and reduces hot spots
• Enhanced cooling capacity over stock plastic reservoir
• Precise OEM mounting location for straightforward installation

This expansion tank is an excellent upgrade for enthusiasts seeking improved cooling system reliability and performance. The aluminum construction provides better heat dissipation than the factory plastic tank while the dual-chamber design ensures consistent coolant flow and effective air purging.